How to start?

First, get CALM. Just contact Dr. Tomasz Tokarski: tomasz@calm-ebsd.com.
The software does not need any installation, i.e. you simply have to move the execution file and glew32.dll together in a directory, together with a few *.ini files for saving some information about the last file processed or the design of your user interface.

  1. Run CALM*.exe.
  2. Click Load button, and select any background-corrected EBSD or TKD pattern ( .jpg, .png, .bmp, .tiff, .gif).
    The pattern is displayed as gnomonic and stereographic projection. If the “display” check box in the “Funk transform” panel at the bottom is active also the Funk transformation of the pattern is displayed, preferably edge filtered.
  3. First, you have to draw four initial non-tautozonal1 lattice plane traces.
    • To draw a line, press the left mouse button at the first position in the gnomonic projection, then move the mouse pointer to a second position in the Kikuchi pattern and release the mouse button.
    • Alternatively, you can do this much easier in the Funk transformation by double-clicking the mouse in the center of four eye-like non-tautozonal features.
    • Please note: All 4 initial traces are assumed to be in the center of visible Kikuchi bands. There are many initial definitions possible, however, the best is to create a convex quadrilateral shape with diagonals also belonging to Kikuchi bands.
  4. Define further lines after selection of already declared points – Ctrl+left mouse button (LMB) – in one of the projections in CALM by double-click.
    In Funk transformation lines (great circles) represent (uvw)* 2.
  5. Define, if necessary, further intersection points by selection of lines (Shift+LMB) in one of the pattern projections in CALM by double-click.
    In Funk transformation intersections indicate [hkl]* 2.
  6. To optimize the defined trace positions, press F3.
  7. After manual definition of about 10 traces and optimization press F4 to search (automatically) for as many bands as possible.
  8. Select a symmetric and well visible reference band (Shift+LMB) and press F5 to define automatically band widths.
  9. If the check box in the panel “Lattice solutions” is active, Bravais lattices candidates are displayed in real time.

The more complicated a crystal structure is the more bands are required for the automated run.
The manual definition is discussed later.

1 These are straight lines, three of which do not meet anywhere at the same point.
2 (uvw)* and [hkl]* are reciprocal lattice planes and directions perpendicular to their counterpart in real space with the same indices.